Below the Falls, Mattapan Postcards Below the Falls, Mattapan No. 393 Postcard. Caption on front: Below the Falls, Mattapan. Copyright 1907 by Boston Post Card Co. Postally unused. On verso: Pub. by Boston Post-Card Co. Facebook Twitter Print Friendly Skills Below the Falls, Dorchester, Mattapan, Neponset River Posted on November 22, 2022 ← Mattapan Bridge Neponset River and Dam at Mattapan →